My hair has a tight wave/light curl but I ordered a medium wave because I wish to have less curl overall. I typically keep my side hair pretty short - will there be an obvious curl/wave/texture mismatch? With my natural hair you can't really see even much of a wave at the 1/2 inch or so that I like to keep it at.

However, will this still look "off"?

no, not if you keep your own hair cut short.
DebbieS.